Main Thread, Critical Section Wait Chains, Critical Section Deadlock, Stack Trace Collection, Execution Residue, Data Contents Locality, Self-Diagnosis and Not My Version

A spooler service process was hanging and its user memory dump shows many threads blocked waiting for critical sections (Volume 1, page 490) including the main one (Volume 1, page 437):

0:000> kL
ChildEBP RetAddr
0007fa94 7c827d29 ntdll!KiFastSystemCallRet
0007fa98 7c83d266 ntdll!ZwWaitForSingleObject+0xc
0007fad4 7c83d2b1 ntdll!RtlpWaitOnCriticalSection+0×1a3
0007faf4 7c82dadf ntdll!RtlEnterCriticalSection+0xa8
0007fb94 7c82dad1 ntdll!LdrpGetProcedureAddress+0×128
0007fbb0 77e63db9 ntdll!LdrGetProcedureAddress+0×18
0007fbd8 01002ea1 kernel32!GetProcAddress+0×44
0007fc38 01002dbc spoolsv!__delayLoadHelper2+0×1d9
0007fc64 7d1e41fc spoolsv!_tailMerge_SPOOLSS+0xd
0007fcd8 7d1e1ed9 ADVAPI32!ScDispatcherLoop+0×287
0007ff3c 01004019 ADVAPI32!StartServiceCtrlDispatcherW+0xe3
0007ff44 010047a2 spoolsv!main+0xb
0007ffc0 77e6f23b spoolsv!mainCRTStartup+0×12f
0007fff0 00000000 kernel32!BaseProcessStart+0×23

0:000> !analyze -v -hang

DERIVED_WAIT_CHAIN:

Dl Eid Cid     WaitType
-- --- ------- --------------------------
   0   3990.3e80 Critical Section       - >
   18  3990.3f28 Critical Section

PRIMARY_PROBLEM_CLASS:  APPLICATION_HANG_HeapCorruption

FOLLOWUP_IP:
msvcrt!calloc+118
77bbcdf3 8945e4          mov     dword ptr [ebp-1Ch],eax

0:018> kL 100
ChildEBP RetAddr
03b589b4 7c827d19 ntdll!KiFastSystemCallRet
03b589b8 77e76792 ntdll!NtWaitForMultipleObjects+0xc
03b58cec 7c8604ae kernel32!UnhandledExceptionFilter+0x7c0
03b58cf4 7c8282f1 ntdll!RtlpPossibleDeadlock+0xa5